Re: [Zope-dev] adapting to None

Dieter Maurer wrote:

I think that in some cases, it would be useful for an adapter factory to say 'I cannot handle this case' and then the adapter lookup is continued. Maybe, this is already supported? Then, maybe, you can use it?

That's exactly what returning None indicates...

...

def some_adapter(obj): if something: return None return somethingelse

Your use case seems to abuse adaptation:

Adaptation to an interface must always return an object which provides the interface. "None", by default, only provides very few interfaces

...indeed, however, I really do want to return None here. cheers, Chris -- Simplistix - Content Management, Zope & Python Consulting - http://www.simplistix.co.uk